Scientists first started answering this question early in the 20th century when Albert Einstein devised the laws of relativity. his first major scientific investigation - would focus on one of the most enduring and profound questions humans have asked throughout the history of our existence: Does the universe have a beginning, or is it eternal? Near the start of The Theory of Everything, a bullish young Hawking declares, "Time is my topic!" What he meant was that his Ph.D. Here is the essence of Hawking's work, explained in 10 gifs: How was the universe created? However, if you loved The Theory of Everything and are intrigued yet confused by the actual science the film touches on, there's hope. In his career, Hawking focused on three fundamental questions: How was the universe created? What happens inside a black hole? What is unifying physical law that governs the entire universe? For the layman, understanding these can seem a daunting task. The details of Hawking's work, which are rooted in relativity and quantum mechanics, are obscured in a labyrinth of equations and abstractions.
While it offers a riveting and detailed portrait of Hawking's life, health and relationships, it glosses over many intricacies of his scientific ideas.Īnd understandably so.
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The film, directed by James Marsh and starring Eddie Redmayne, tells the story of Hawking's inspirational and dramatic personal and professional journey. They also drive this year's blockbuster hit The Theory of Everything.
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Click on any of Microphones Image to open and download it."Where did we come from? How did the universe come into being? Are we alone in the universe? Is there alien life out there? What is the future of the human race?" Such questions are at the heart of renowned physicist and cosmologist Stephen Hawking's life's work. Download Microphones Animated GIF Images. In 1861, German inventor Johann Philipp Reis built an early sound transmitter (the 'Reis telephone') that used a metallic strip attached to a vibrating membrane that would produce intermittent current. In 1665, the English physicist Robert Hooke was the first to experiment with a medium other than air with the invention of the 'lovers' telephone' made of stretched wire with a cup attached at each end. Some of the first examples, from fifth century BC Greece, were theater masks with horn-shaped mouth openings that acoustically amplified the voice of actors in amphitheaters. The earliest devices used to achieve this were acoustic megaphones. In order to speak to larger groups of people, a need arose to increase the volume of the human voice.
Microphones typically need to be connected to a preamplifier before the signal can be recorded or reproduced. The most common are the dynamic microphone, which uses a coil of wire suspended in a magnetic field, the condenser microphone, which uses the vibrating diaphragm as a capacitor plate, and the contact microphone, which uses a crystal of piezoelectric material. Several types of microphone are used today, which employ different methods to convert the air pressure variations of a sound wave to an electrical signal. They are also used in computers for recording voice, speech recognition, VoIP, and for non-acoustic purposes such as ultrasonic sensors or knock sensors. Microphones are used in many applications such as telephones, hearing aids, public address systems for concert halls and public events, motion picture production, live and recorded audio engineering, sound recording, two-way radios, megaphones, radio and television broadcasting. SORT GIFs Downloads Date Ratings A microphone, colloquially called a mic or mike (), is a device a transducer that converts sound into an electrical signal.
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